Parses a Nunjucks template and returns the top-level variable names it reads, following stored
templates it pulls in by literal name. The result is incomplete when a template is named by an
expression, a named template is missing or cannot be loaded, the text does not parse, or a tag
comes from an extension the analysis does not know.
Parses a Nunjucks template and returns the top-level variable names it reads, following stored templates it pulls in by literal name. The result is incomplete when a template is named by an expression, a named template is missing or cannot be loaded, the text does not parse, or a tag comes from an extension the analysis does not know.